HEIDENHAIN SW 54843x-03 DIN Programming - Manual (Page 536)

536 DIN programming for the Y axis
6.7 Milling cy
cles f
o
r the Y axis
For the cutting direction, machining direction and direction of tool
rotation, please refer to table G845 in the User's Manual.
For the machining direction Q=1 (from the outside toward
the inside), please note:
 The contour must start with a linear element.
 If the starting element is < WB, WB is reduced to the
length of the starting element.
 The length of the starting element must not be less than
1.5 times the diameter of the milling cutter.
Cycle run
1 Starting position (X, Y, Z, C) is the position before the cycle
begins.
2 Calculate the number of cuts (infeeds to the milling planes,
infeeds in the milling depths) and the plunging positions and
paths for reciprocating or helical plunges.
3 Approach to safety clearance and, depending on O, feed to the
first milling depth or approach helically or on a reciprocating path.
4 Mill a plane.
5 Retract by the safety clearance, return and cut to the next milling
depth.
6 Repeat steps 4 and 5 until the complete surface is milled.
7 Return to retraction plane RB.